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This is a set of changes to the init property service
implementation to apply a SELinux check over who can
change what properties. Also included control hooks
for the 'ctl' keys.

Change-Id: I5a18809bf5536f6459a36b6bf0d622b9f5061aa0
Signed-off-by: rpcraig <rpcraig@tycho.ncsc.mil>